Advances in Catalytic Pyrolysis of Hydrocarbons

Meng, Xianghai; Gao, Jinsen; Li, Li; Chen, Xu

doi:10.1081/lft-200034097

Cited by 40 publications

(13 citation statements)

References 4 publications

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“…Light olefins are traditionally produced by steam pyrolysis of ethane, propane, butane, naphtha, light diesel, or heavier hydrocarbons. Compared with steam pyrolysis, catalytic pyrolysis presents advantages such as low reaction temperature, low energy consumption, easy control of product distribution, and a wide range of feedstocks, including heavy oils . Catalytic pyrolysis has become a promising approach to the production of light olefins.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Catalytic Pyrolysis of C4 Hydrocarbons on a Modified ZSM-5 Zeolite Catalyst

Meng¹,

Chen²,

Li³

et al. 2010

Energy Fuels

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The reaction mechanism for catalytic pyrolysis of C4 hydrocarbons on a modified ZSM-5 catalyst was analyzed. With the overall reactants and products classified into six species, a 6-lump kinetic model was established to describe the reactions with appropriate assumption. Rate constants of the kinetic model at 480, 500, 530, and 560 °C were estimated by a nonlinear least-squares regression method. Pre-exponential factors and apparent activation energies were then calculated according to the Arrhenius equation. The 6-lump kinetic model showed good prediction performance, with predicted yields close to the experimental ones. The variation in ethene and propene yields with reaction temperature and the weight hourly space velocity of C4 hydrocarbons were predicted using the lump model as basis.

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Section: Introductionmentioning

confidence: 99%

Kinetic Study of Catalytic Pyrolysis of C4 Hydrocarbons on a Modified ZSM-5 Zeolite Catalyst

Meng¹,

Chen²,

Li³

et al. 2010

Energy Fuels

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“…To enhance the yields of ethene and propene with less energy consumption, many processes have been proposed, including dehydrogenation of ethane and propane, the metathesis of ethene and butene, methanol to olefin (MTO), − some special fluidized catalytic cracking (FCC) processes, − etc. Among them, the catalytic cracking technique, because of its prominent ability to reduce the reaction temperature and adjust the product distribution, has been considered as an attractive alternative to produce ethene and propene. , …”

Section: Introductionmentioning

confidence: 99%

Highly Effective F-Modified HZSM-5 Catalysts for the Cracking of Naphtha To Produce Light Olefins

et al. 2010

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A series of fluorinated HZSM-5 zeolites (F/HZSM-5) were prepared by immersing the zeolites with different concentrations of NH4F solution, and their performances for the catalytic cracking of naphtha to produce light olefins were investigated. The results indicated that F-modified HZSM-5 zeolites are effective catalysts for the cracking of naphtha to light olefins. At the temperature of 600 °C, the yields of propene and ethene were achieved at 36.4 and 20.2%, which were 7.3 and 4.3% higher than those over parent HZSM-5 zeolite, respectively. The physicochemical features of F/HZSM-5 catalysts were characterized by means of X-ray diffraction (XRD), Brunauer−Emmett−Teller (BET), temperature-programmed desorption of ammonia (NH3-TPD), Fourier transform infrared (FTIR) spectra of adsorbed pyridine, etc. The results indicated that fluorine (F) modification not only regulates the pore characteristics of the HZSM-5 zeolites but also modulates the amount of acid sites, especially the amount of Brönsted (B) acid. Consequently, F modification with suitable content was favorable for increasing the conversion of naphtha and enhancing the selectivity to light olefins.

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“…The conflict between the low production capacity of ethylene and propylene and their rapid increasing market demand becomes more and more serious [2]. To solve this problem, various technical studies on the production of ethylene and propylene have attracted great interest [3,4]. From the viewpoint of the cost of investment and production, catalytic pyrolysis of C4 and C5 hydrocarbons is considered as one of the most attractive approach [5].…”

Section: Introductionmentioning

confidence: 99%